Inserts are supplied including a rocker/cover and protective cover. Fastening using screws - inserts for screw fastening can be retrofitted with expansion claws, order no. 665099. Phase control dimmer 40 - 400 W with lamp-friendly soft start/soft stop. Simple and clear operation with 2-button operation. Separate extension input for conventional normally open buttons for switching and dimming. 40 - 400 W for incandescent and high-voltage halogen lamps, 40 - 400 VA for low-voltage halogen lamps with conventional (iron core) transformer. Load type: R, L. - 2-wire connection (without neutral conductor), - screw terminals